Composition for air polishing

1. A method of treating dental tissue using a composition for air polishing a surface of hard dental tissue, the composition comprising at least:

an abrasive first powder suitable for polishing hard dental tissue, the first powder comprising sodium bicarbonate, calcium carbonate, glycine, a silicate, silica, silicon hydroxide, silicon carbide, powdered pumice stone, diamond powder, aluminum oxide, aluminum hydroxide, or a mixture of these compounds, a mean grain size of the first powder being in the range of 5 μm to 500 μm;

a second powder of a gelling agent comprising a poloxamer, hydroxypropylmethyl cellulose, methyl cellulose, a carrageenan, or a mixture thereof; and

a third powder of a dental treatment agent, the dental treatment agent comprising a therapeutic agent, a coloring agent, or a mixture thereof;

wherein the method comprises at least:

air polishing the hard dental tissue during which the composition is sprayed against said tissue at a first distance from the tissue;

and then spraying the composition at a second distance from the tissue, the second distance being greater than the first distance, to form a gel on the hard dental tissue and/or on soft dental tissue.

2. The method according to claim 1 , the second powder being present in the composition at a content by weight lying in a range of 0.5% to 80%.

3. The method according to claim 1 , a mean size of the grains of the second powder lying in a range of 0.5 μm to 400 μm.

4. The method according to claim 1 , the first powder comprising sodium bicarbonate, calcium carbonate, glycine, or a mixture of such compounds.

5. The method according to claim 1 , the first powder comprising glycine and the second powder comprising a poloxamer.

6. The method according to claim 1 , the first powder comprising sodium bicarbonate and the second powder comprising a poloxamer.

7. The method according to claim 1 , the first powder being present in the composition at a content by weight lying in a range of 15% to 98%.

8. The method according to claim 1 , the composition comprising:

the first powder at a content by weight lying in a range 15% to 98%;

the second powder at a content by weight lying in a range 0.5% to 80%; and

the third powder at a content by weight lying in a range 0.005% to 25%; and

optionally, an anti-caking agent at a content by weight lying in a range 0.05% to 10%.

9. The method according to claim 8 , the composition comprising:

the first powder at a content by weight lying in the range of 70% to 98%;

the second powder at a content by weight lying in the range of 0.5% to 20%; and

the third powder at a content by weight lying in the range of 0.005% to 25%; and

optionally, an anti-caking agent at a content by weight lying in the range of 0.05% to 10%.

10. The method according to claim 8 , the composition comprising:

the first powder at a content by weight lying in the range of 15% to 70%;

the second powder at a content by weight lying in the range of 20% to 80%; and

the third powder at a content by weight lying in the range of 0.005% to 25%; and

optionally, an anti-caking agent at a content by weight lying in the range of 0.05% to 10%.

11. The method according to claim 1 , the therapeutic agent comprising an antiseptic agent, an anti-inflammatory agent, an anesthetic agent, a desensitizing agent, a remineralizing agent, an astringent agent, or a mixture of such agents.

12. The method according to claim 1 , wherein the composition is sprayed by a dental air polishing tool having a nozzle and a tank containing the composition, the composition being prayed through the nozzle under pressure surrounded by a jet of liquid.

13. The method according to claim 1 , wherein the treatment is a therapeutic treatment of dental tissue.